Yang Zuguang, Li Min, Lu Guanjie, Wang Yumei, Wei Jie, Hu Xiaolin, Li Zongyang, Li Penghua, Xu Chaohe
College of Aerospace Engineering, Chongqing University, Chongqing, 400044, China.
National University of Singapore (Chongqing) Research Institute, Chongqing, 401123, China.
Small. 2022 Aug;18(31):e2202911. doi: 10.1002/smll.202202911. Epub 2022 Jul 10.
Solid-state lithium metal batteries (SSLMBs) promise high energy density and high safety by employing high-capacity Li metal anode and solid-state electrolytes. However, the construction of the composite Li metal electrode is a neglected but important subject when the extensive research focuses on the interface between the solid electrolyte Li La Zr Ta O and Li metal anode. Here, an electronic-ionic conducting composite Li metal anode consisting of Li-Al alloy and LiF is constructed to achieve the stable electronic-ionic transport channel and the intimate interface contact, which can realize the uniform Li deposition and the efficiency utilization of lithium in composite Li metal electrode. Therefore, the symmetric battery with composite Li metal electrode exhibits the high critical current density with 1.2 mA cm and stable cycle for 1500 h at 0.3 mA cm , 25 °C. Moreover, the SSLMBs matched with LiFePO and LiNi Co Mn O achieve the outstanding electrochemical performance, verifying the feasibility of composite Li metal electrode in various SSLMBs systems.
固态锂金属电池（SSLMBs）通过采用高容量锂金属负极和固态电解质，有望实现高能量密度和高安全性。然而，当广泛的研究集中在固态电解质LiLaZrTaO与锂金属负极之间的界面时，复合锂金属电极的构建是一个被忽视但重要的课题。在此，构建了一种由锂铝合金和LiF组成的电子-离子传导复合锂金属负极，以实现稳定的电子-离子传输通道和紧密的界面接触，从而在复合锂金属电极中实现锂的均匀沉积和高效利用。因此，具有复合锂金属电极的对称电池在25℃、0.3 mA cm²时表现出1.2 mA cm²的高临界电流密度，并能稳定循环1500小时。此外，与LiFePO₄和LiNiCoMnO₂匹配的SSLMBs具有出色的电化学性能，验证了复合锂金属电极在各种SSLMBs系统中的可行性。
